... Tunnel or Tube7. Anywhere you can imagine (such as Subway, Metro, Parking Lot, Building etc.)Why Use Photoluminescent Signs instead of ... 200 people died in Korea Conflagration Incident happened in Taegu Metro on 18th, Feb. 2003, which used traditional Safety Signs for ... based on the requirements of localities, such as floors, stairs, metro and so on.General maintenance only requires cleaning of the ...